Machine for intermittently displaying posters and the like.



I E. W. BROWN. MACHINE FOR INTERMITTENTLY DISPLAYING POSTERS AND THE LIKE.

APPLICATION FILED JUNE 2, 1914.

Patented Mar. 23, 1915.

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. E. W. BROWN.

MACHINE FOR INTERMITTENTLY DISPLAYING POSTERS AND THE LIKE.

APPLICATION FILED JUNE 2, 1914. 1,1 32,91 0. Patented Mar. 23, 1915.

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EDWARD WILLIAM BROWN, OF I- IULBORN, LONDGN, ENGLAND.

MACHINE FOB IILEEERIVII1PT.?!NTLY DISPLAYING POSTERS AND THE LIKE.

Specification of Letters Patent.

Application filed June 2, 1914. Serial No. 842,530.

To all whom it may concern.

Be it known that I, EDWARD WILLIAM BROWN, subject of the King of Great Britain, residing at 8 and 9 Grays Inn Passage, Red Lion street, in the boroughof Holborn, county of London, England, have invented certain new and useful Improvements in Machines for Intermittently DisplayingPosters and the like, of which the following is a specification.

This invention relates to machines for intermittently displaying posters and the like, ofthe kind in which the poster is mounted on or forms a portion of a band, which is led across an aperture, before which the poster is held stationary and exposed to view, either the band being unwound from one roller and wound upon another the direction of winding being reversed when all the bandhas been paid out, or the band being endless and moving in a constant direction. a, The chief feature of the present invention resides in the means for intermittently stopping and starting the band of posters, and consists in the circuit of the electro-motor, which drives the contrivance, having switches arranged in parallel, one of which is opened during the passage of a poster across the display aperture and the other switch being opened and stopping the motor when the poster has come into the displaying position, whereafter the first switch is closed on a delaying device eventually yielding, thereby again starting the motor and the band.

Another featureof the invention consists in the improved means for reversing the direction of rotation of the motor and travel of the band, and for driving the winding roller and disconnecting from the motor the roller which is paying'out the band.

An example of a machine according to the presentinvention is illustrated on the accompanying drawings, in which Figure 1 is a rear elevation, Fig. 2 a sec- .tion showing the right hand side. and Fig. 3

a section showing the left hand side of the machine. Fig. 4: is an elevation of one of the driving clutches on an enlarged scale. Fig

5 is a fragmentary elevation showing the method of mounting the posters.

a is a band, of linen for instance, which is led from a roller 6 over a guide roller 0 at the bottom of the machine past an exposure aperture and over a guideroller c to a roller 6 at the top of the machine, the hand a being unwound from the one roller 6- or b and wound on the other Z2 or 5 ac; cording to which roller is being driven.

The drive is effected by van electro-motor (Z, through a reducing gear 6, the counter shaft 6 of which has secured thereon a pair of sprocket wheels 7". These sprocket wheels fare connected by pitch chains 9 9 respectively to a sprocket wheel f mounted free on the spindle of the lower roller Z2 and to a sprocket wheel f mounted free on the spindle of the upper roller 6 The boss of each sprocket wheel F, f adjacent to the respective roller b 6 is formed with a crown ratchet tooth f and the boss on the other side of each sprocket wheel 7, 2 is formed with an oppositely directed crown ratchet tooth f. The teeth 7 and 7 of the one sprocket wheelf are oppositely directed'to the corresponding teeth f and f of the other sprocket wheel P. Free on the spindle of each roller 6 b alongside each sprocket wheel 7, f is a sleeve it held frictionally by clamps 2'. These sleeves h each have a crown ratchet tooth 72. directed to engage the corresponding teeth f of the sprocket wheel f P. On rotation of the counter shaft 0 in a direction to cause the roller 5 to wind on itself the band a, the tooth f of the sprocket wheel f rides along the inclineof the tooth h of the respective sleeve 71 because this latter is subjected to the drag of the brake clamps 2', and the sprocket wheel 7 is displaced along'the spindle toward the roller 6 whereby the tooth f on the other side enters into engagement with a pin 7'. At the same time the tooth f of the lower sprocket wheel 7 rides by its incline against thepin j of the lower roller 5 and is displaced toward the respective sleeve it, whereby its other tooth f enters into engagement with the tooth 71 of this sleeve h and rotates the latter. By virtue of the drag of the brake clamps e on the sleeve it and the teeth 7 andiz. being undercut, the sprocket wheel 7 is'kept away fromtheroller 6 until the direction of rotation is reversed, when the opposite series of operations occur.

The above arrangement insures that the roller b or b 'which is being unwoundis disconnected from the driving mechanism, thusallowing it to rotate difierentially as Patented Mar. as, rats.

lot i its effective diameter decreases due to the unwrapping of the band a therefrom.

A oneway clutch disk in is mounted on the spindle of each of the rollers and b at the ends of the rollers remote from the sprocket wheels 7, 7. When the respective roller is paying out the band a the respective free-wheel disk 70 is carried around by the spindle, and as each disk 70 is permanently gripped between brake clamps 70 the roller is subjected to a braking action which keeps the band a taut. When the roller rotates in the reverse or winding direction, its spindle rotates freely in the free-wheel disk Z4, which therefore does not revolve, being held by the brake clamps 70 and no resistance is thereby imposed to the rotation of the roller.

The motor (Z and band a are stopped and after an interval re-started as follows :A transverse slat Z is mounted on the band a at the ends of each poster, the ends of the slats when passing across the machine, running in the grooves Z in each side of the machine. During its passage across the machine, each slat Z forces back a plunger rod m which through a bell-crank m raises a weighted contact bar a out of contact with a spring contact of, these two contacts being in a parallel circuit of one of the leads of the motor. The weighted contact bar a is pivoted to a link a and on its descent by gravity drives a clockwork train 71; having a fan a.

At the top and at the bottom of the machine a lever 0 is pivoted with one end in the path of the slats Z. On one or the other of the levers 0 being displaced by a slat the other end of the lever 0 is moved out of contact with a contact 0 in a second parallel circuit of the motor lead. The other parallel circuit having been already interrupted at n a and as the contact levers 0 and contacts 0 are in series, on one or the other of the levers 0 being displaced out of contact with the respective contact 0 current is cut off from the motor, which stops.

On the clockwork a eventually running down, the bar it makes contact with the spring contact 11 which closes the respective parallel motor circuit, and the motor starts. The slats which have been holding back the levers 0, then, by the progress of the band, are moved away from these levers, which are returned by springs 0 to their contacts 0 and this parallel circuit is re established and keeps the motor running when m 11 are again separated by a slat forcing back the plunger rod m.

The momentum of the mechanism causes the band to move a slight distance even after the current has been cut off from the motor.

Gogaies oi this patent may be obtained for five cents each,

Hence two'switch levers 0 in seriesare employed, because one lever 0 only, set to stop the motor sufficiently ahead of the position at which the band'comes to rest when moving in one direction, would stop the motor too late in the other direction. With the two switch levers 0, one can be located at the proper position for each direction, and the current is cut off by the first lever 0 displaced.

When all the posters have been unwrapped from the unwinding roller Z2 or 6 a stud 79 on the terminal slat Z at one end of the band a and the last slat Z but one at the other end of the band, strikes a sliding tappet Q and carries it along in the same direction as the band ais traveling. T hereby a triangular spring-pressed nose 9 on a rod pivoted to the sliding tappet 9, displaces a reversing switch lever r, pivoted at r", by riding over a stud r protruding from a lateral arm r of the switch lever r.

l/Vhen either of the switch levers 0 is displaced off the contact 0 it makes contact with a contact plate 0 which closes the circuit of the illuminating lamps. The two contacts 0 are in parallel.

The posters have slats t at each end, to which spring wires t are attached with their ends free. The ends of the wires 25 are snapped into metal strips t embracing the slats Z, thus holding the posters on the band.

I claim:

1. In a poster displaying machine, a band of posters, an electromotor, driving means interconnecting said band and said motor, parallel circuits of said motor, a switch in each said parallel circuit, means for opening one said switch during the passage of each said poster across said machine and for opening the other said switch at the end of said passage and retarded means for closing said first switch after said second switch has been opened.

2. In a poster displaying machine, a roller at opposite ends of said machine, a band of posters led around said rollers, slats between each said poster, an electro-motor, means interconnecting one of said rollers and said motor, parallel circuits of said motor, a switch in one said circuit in the path of said slats, means for delaying closure of said switch and a circuit breaking switch in the other said circuit in the path of said slats.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD /VILLIAM BROWN.

WVitnesses:

ROBERT ARTHUR SMITH, Row. A. BLAKE.

by addressing the Gommissioner of Eateats,

Washington, D. G, 

